Machine for manufacturing can-opening keys.



No. 670,168. Patented Mar. [9, I901.

J. ZIMM ERMAN & B. WIRTH. MACHINE FOB MANUFACTURlNG DAN OPENING KEYS.

. (Application filed Aug. 15, 1900.\ Ho ModeL, 9 Sheets-Sheet l.

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A licati'mmed A'u 15, 1900.

9 Sheets-Sinai 2.

(No Model.)

M l w ,WIIII fi K My No. 670,l68. Patented Mar. l9, l90l. J. ZIMMEBMAN &R, WIRTH.

MACHINE FOR MANUFACTURING CAN OPENING KEYS.

(Application filed Aug. '15,v19oo.\ (No Model.) 9 Sheeis -Sheet 3.

THE NORRIS PETERS 00.. Pnorauwo. WASHYNOTGN, n. cy

m B N r a M 0 8 t n B .t a H T mm W B & N A M R E M m z MACHINE FORMANUFACTURING CAN OPENING KEYS.

(No Model.)

Nu 67U,l68. Patented Mar. 19, 190i. J. ZIMMERMAN & R. WIBTH.

MACHINE F05 MANUFAGTURENG CAN OPENING KEYS.

(Application filed Aug. 15, 1900.) (No Model.) 9 Sheets-Sheet 5.

No. 670,!68. Patented Mar; l9, I90l. J. ZIMMERMAN & R. WIRTH.

MACHINE FOR NANUFAGTUBING CAN OPENING KEYS.

(Application filed Aug. 16, 1900.) (No Plodek) 9 Sheets-$heet 6.

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MACHINE FOR MANUFACTURING CAN OPENING KEYS.

(Application filed Aug. 15, 1900.= (No Model.) 9 Sheets-Sheet 7.

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No. 670,!68. Patented Mar. [9, IQOI. J. ZIMMERMAN & R. WIRTH.

MACHINE FOR MANUFACTURING CAN OPENING KEYS.

I (Application fil d Aug 15, 1900,: (No Modei.) 9 Sheets-Shaet-fi.

i M y i Patented Mar. l9, IBM. J. ZlMMERM-AN &. R. WIRTH.

MACHINE FOR MANUFACTURING CAW'BPENING KEYS.

. (Application filed. Aug. 15, 1900.\

(No Model.)

9 Sheets-Sheet 9.

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UNTTsn STeTas PATENT- FFIQE.

MACHINE FOR MANUFACTURING CAN-OPENING KEYS.

SPECIFICATION forming part of Letters Patent No. 670,168, dated March19, 1901.

Application filed August 15. 1900. Serial No. 26,984. (No modeiii To allwhom it may concern:

2e it known that we, JOHN ZIMMERMAN and RUDOLPH WIRTH, citizens of: theUnited States, residing at Chicago, in the county of (look and State ofIllinois, have invented certain new and useful Improvements inMachinesfor Manufacturing Oan-OpeningKeys, of which the following is aspecification.

The invention relates to that class of machines known as power-presses,and particularly to the construction and arrangement of the mechanismsthereof by which keys for opening metallic cans can be simply andeconomically constructed, all of which will more fully hereinafterappear.

The principal object of the invention is to provide a simple,economical, and efficient machine for automatically manufacturingcan-opening keys from a strip of metal Wire; and the invention consistsin the features, combinations, and details of construction hereinafterdescribed and claimed.

In the accompanying drawings, Figure 1 is a plan view of a machineconstructed in accordance with these improvements looking at it from thetop. Fig. 2 is an end elevation of the machine looking at it from line 2at the right of Fig. 1. Fig. 3 is an enlarged sectional elevation of aportion of the mechanism, taken on line 3 of Fig. 1 looking in the Fig.4. is a plan sectional view of a portion of the mechanism, taken on line4: of Fig. 2 lookingin the direction of the arrow. Fig. 5 is an enlargedsectional elevation of a portion of the mechanism, taken on line 5 ofFig. 1 looking in the direction of the arrow. Fig. 6 is a sectionalelevation of a portion of the mechanism, taken on line 0 of Fig. llookingin the direction of the arrow. Fig. 7 is a similar View taken online 7 of Fig. 1. Fig. 8 is a longitudinal sectional elevation of aportion of the mechanism, taken on line 8 of Fig. 1 looking in thedirection of the arrow. Fig. 9 isasimilar View taken on line 9 of Fig. 1looking in the direction of the arrow. Fig. 10 is a plan view of themechanism shown in Fig. 9 looking at it from the top. Fig. 11 is anenlarged detail of a portion of the mechanism illustrated in Fig. 9,showing a completed key ready to be discharged. Fig. 12 is alongitudinal plan sectional View of the mechanin Fig. 11, showing thecompleted key in dotted outline as it is being discharged from themachine. Fig. 14 isa plan sectional view taken on line 14 of Fig. 13looking in the direction of the arrow. Fig. 15 is an enlarged sectionalelevation taken on the irregular line 15 of Fig. 9. Fig. 16 is anelevation of a portion of the mechanisms illustrated in Fig. 15 andhereinafter described. Fig. 17 is an enlarged sectional detail taken online 17 of Fig. 9 looking in the direction of the arrow. Fig. 18 is aperspective detail of one of the rigid holding-blocks for holding thebody of the key in position during the spreading operation. Fig. 19 is aperspective detail of the block for holding the loop end of the keylooking at it from the inside. Fig. 20 is an end view of a portion ofthe mechanism shown at the lower part of Fig. 14. looking at it from theright. Fig. 21 is an enlarged sectional detail taken on lines 2L ofFigs. 14 and 20 looking in the direction of the arrow. Fig. 22 is anenlarged sectional detail taken on lines 22 of Figs. 14 and 20 lookingin the direction of the arrow, and Fi 2b is a plan view of the completedkey.

The can-opening key to which this invention relates is formed ofsoft-steel wire flattened on two sides and perforated at one end andspread so as to form the loop of the key and at the other to form thekey-slot, as shown.

particularly in Fig. 23.

In constructing a machine to manufacture a key of this type a bedportion a of the desired size, shape, and strength is provided andarranged to support the operative and other mechanisms in position foruse. This bed portion is preferably provided at or near each end withlegs or standards 6, tied together by the usual cross or stay bolts,(shown in Fig. 3,) all of which is thoroughly understood by thoseskilled in the art.

The first step in the operation after the wire has been provided is tostraighten it that is, to remove all the kinks and curvatures in thesame as it leaves the reel and before it enters the guide mechanism. Toprovide for this result, a straightener c is provided, (shown at theright hand of Fig. 1,)

which is of the usual typeviz., a plurality of rolls d, arranged in suchmanner as to grasp and permit the wire to pass between them and, as isthoroughly understood in the art, to remove all kin ks and curvaturestherein and feed it to the mechanism in a substantially straightcondition. The construction and arrangement of a wire-straightener ofthis kind are well known in the art, and as it forms no material part ofthis invention we deem a further or detailed description of the sameherein unnecessary. As the wire leaves the straightener it is passedthrough guides e, f, and g. (Shown particularly in Figs. 9 and 10.)After it leaves these guides, which are practically the holding-guides,it is desirable to first perforate it through the fiat portion, so as topermit it afterward to be spread and cut the desired length. In order toaccomplish this, the wires are fed, by the mechanism hereinafterdescribed, into contact with the die h, (see Figs. 6 and 12,) which hasa stripper 11 arranged above the same, so as to form a space throughwhich the wire may be passed and at the same time prevented from beingdrawn outwardly by the punches as they are retracted. A set of punchesj, k, and Z are provided, of which the punchj perforates the wire in theportion to form the loop, the punch k perforates the wire to form thekey-slot, and the punch l is the cutting-011 punch, which first cuts offthe end of the wire to the desired length and subsequently the completedkey. These punches are mounted in a cross-head m of the usualconstruction, and which in turn is slidingly mounted in guides 91,adjustably secured to the bed of the machine by means of set-screws 0.To reciprocate the cross-head, a crankshaft 29 is provided and journaledin suitable bearings in the bed of the machine, as shown particularly inFigs. 1, 5, and 6. An adjustable pitman q of the usual construction andarrangement is rotatably mounted upon the crank-pin of the crank-shaftand pivotally connected with the cross-head guide at r, so that as thecrank-shaft is rotated the crosshead guide, with its punches, isreciprocated or moved inwardly and outwardly to perfo rate and cut edthe wire at the desired time or times.

After the wire has been punched or perforated, as above described, it isnecessary to feed it forward one step in order to bring it into positionto have its loops spread and cut off. To accomplish this result, feedingmechanism is provided, which is composed of a pair of feeding-rolls 8,(see Figs. 1, 2, and 33,) mounted upon shafts t and u, by which they arerotated, as hereinafter described. The shaft tis mounted in movableboxes '0, in turn slidingly mounted in ways w, so that such shaft may bemoved inwardly or outwardly to permit the feed-rolls to get the desiredgrip upon the wire. These feed-rolls are grooved in theirouterperipheral surfaces, as shown distinctly in Fig. 3, so that theflattened wire may be firmly gripped and fed forward without any dangerof becoming disengaged from the roll. These feed-roll shafts areprovided with spur-gears a; and y, engaging with each other, so that asthe driving-shaft u is rotated rotation is also imparted thereby to theshaft 15. It will be understood, of course, that itis necessary thatthese feed-rolls should be operated only when it is necessary to feedthe wire forward and should be inoperative at all other time or times,particularly at the time when the wire is being perforated, the loopspread, and the completed key cut off. In order to accomplish thisresult, the feedroll shaft to has mounted thereon and in rigidengagement therewith a ratchet-wheel z. A lever 24 is next provided andloosely mounted upon the same shaft, one end of which carries a pawl 25,engaging with the teeth of the ratchet, so that as the lever swings inone direction the ratchet-wheel, with its attached mechanisms, isrotated, but is permitted to swing in the other direction withoutoperating the ratchet in any way whatever. A detent or dog 26 isprovided, mounted upon a block 27 and also engaging the ratchet-teeth,so as to prevent such ratchet and its attached mechanism from having abackward rotation during the backward oscillations or vibrations of thelever 24.

To impart the necessary vibrations or oscillations to the lever 24, acrank-disk 28 is provided, having pivotally secured thereto at a pointeccentric to its axis a connecting-rod 29, which is also pivotallysecured at 30 to the oscillating lever, so that as-the crank-disk isrotated, as hereinafter described, the lever is oscillated in onedirection during substantially one-half its rotation and in the otherdirection during the remainder of the rotation of the disk, so thatthere is a period of time equal to one-half of the rotation of thecrank-disk during which the feed-rolls are operated and a remainingperiod equal to onehalf of the rotation of the crank-disk during whichthe feed-rolls and attached mechanisms remain inoperative. To operatethe crankdisk, it is mounted upon a shaft 31 a-tthe lower end thereof,the upper end of which is provided with a bevel-pinion 32, engaging asimilar bevel-pinion 33 on the end of the crankshaft, so that therotations of such crank-disk are equal to the rotations of thecrank-shaft, thereby providing for the correct timing of the feed-rollsand movements of the wire to be operated upon.

The wire having been fed forward into the position shown in Fig. 9, itis necessary to spread the loop and cut 0d the wire, so as to completethe key. The first step, however, is to feed the wire forward and holdthe end of it, as shown particularly in Fig. 9, so that during thespreading operation the split or perforation will not be openedcompletely through the end of the key. To accomplish this result, aholder34is provided and mounted upon a sliding block 35. This holder, as

, Figs. 9 and 11.

shown in Figs. 11 and 19, is made in two parts secured together by meansof a screw 36 and to the slid e-blocks by means of screws 37. It is alsogrooved or slotted in the back portion at 38, of a depth and width equalto the width and thickness of the end of the key, as shown in Fig. 11,so that when it is moved forward, as shown in Figs. 9 and 11, it is inposition to receive the end of the wire and hold it during the spreadingoperation, as shown particularly in Fig. 11, and thereby prevent theslit from extending clear through to the end and at the same timeprovide for the proper curve of the loop. To move this sliding block,with its attached holder, back and forth at the proper time or times, aface-cam 39 is provided (see Fig. 5) and mounted upon the inner end of ashaft 10, the outer end of which is provided with a bevel-pinion 41,engaging a similar bevelpinion 42 upon the left-hand end of thecrankshaft, as shown particularly in Figs. 1 and 5. This face-cam isprovided with a cam-groove 43, 111 turn engaging a trunnion orroll-LL41, secured to the sliding block which carries the holder. Thiscam-groove is of such shape (see Fig. 8) that in one portion of it theholder is permitted to remain stationary long enough for the spreadingoperation to be performed and at other times to move the same back orforth to remove the holder from position and permit the key to drop, asshown in Fig. 13, or forward into position to permit the loop of the keyto be spread, as shown in It is also desirable that the body of the keybe firmly held in position during the operation of spreading and bepermitted to discharge when such spreading and cutting-off operationsare completed. In order to accomplish this result, a set of holders 45and 46 is provided. The holder 45 is rigid or stationary and is providedwith a downwardly extending lip 47, While the holder 46 is reciprocatedin a vertical plane and has a flat lower edge, and, as shownparticularly in Fig. 15, both of such holders are arranged at rightangles to the movement of the wire. The movable holder46 is attached, bymeans of screws 48, to aslide 49, mounted in the ways 50, (see Figs. 11and 15,) and is moved up and down therein-downwardly against the tensionof a spring 51 and up wardly by means of a rocking lever 52, which ispivoted to the frame of the machine at 53. This rocking lever at one endcontacts a screw 5 1 in the movable holder and at the other is providedwith a roll 55, which contacts an inclined cam 56 on the slide 35, soconstructed and arranged that as the sliding block is moved forward withits holder to grasp the loop end of the key the vibrating lever isoperated to move the holder 46 upwardly and force the body of the keyagainst the rigid holder 45, and thus firmly hold the key in position during the spreading operation.

In order to spread the perforated end of the key which forms the loop, aspreader 57 is provided and mounted in the end of a sliding block 58, asshown particularly in Figs. '7 and 14:, which in turn is slidinglymounted in the cross-head, as shown in Fig. 8. It is desirable, however,that the motions of this spreader-slide be independent of the motions ofthe cross-head and that it be moved backward and forward at the propertime. In order to accomplish this result, this spreaderslide isslidingly mounted in the cross-head, as above suggested, and has itsouter end provided with a pin 59, engaging with a camgroove 60 of aface-cam 61. This face-cam is mounted upon the crank-shaft so as torotate therewith, and its cam-groove is of such shape and construction,as seen clearlvin Fig. 7, as to permit the spreader-slide to be movedforward at such time or times as to enter the perforation and spread theloop of the key, as shown clearly in Figs. 11 and 12.

It is desirable that some means he provided by which a backing may befurnished for the wire which forms the loop as such loop is spread andat the same time permit the spreader to pass through the loop. In orderto accomplish this result, two backing-blocks 62 and 63 are provided andslidingly mounted in the holder 64, which also holds the bodyholder 45in position. (See 11, 12, and 15.) These backing-blocks are so arrangedthat they meet substantially at the center of the perforation in the keyand are normally held in such position by means of the helical springs65 and 66. They are also beveled at 67 to permit the end of the spreaderto be inserted between them and separate them as it oontinuesitsinsertiomwhile at the same ti me, as clearly seen in Fig. 15, furnishingaback for the wire portion of the loop and preventing it from beingdistorted or twisted. As the loop is formed, its wire con tacts adischargingplunger 68, as shown in Figs. 11 and 15, so that when suchspreader is removed, the key IIO cut off, and movable block retracted,as shown in Fig. 13, this discharging-plunger forces the key out ofposition and permits it to drop down onto the bed of the machine, whereit may pass through the opening 69 and be caught in any desired box orreceptacle.

To furnish suiiicient power for driving the crank-shaft, such shaft isprovided with a large spur-gear 70, engaging with a drivingpinion 71 ona driving-shaft '72, which latter shaft is provided with tight and loosepulleys 73 and 74 and with a balance-wheel 75, all of which isunderstood by those skilled in the art and which transmit the desiredpower and motion to and through the crank-shaft for all the othermechanisms.

While we have described ourinvention with more or less min u teness asregards details of construction and arrangement and as being embodied incertain precise forms, it will be understood that we do not desire to belimited thereto unduly or any more than is pointed out in the claims. Onthe contrary,

we contemplate all proper changes in form, construction, andarrangement, the omission of immaterial elements and the substitution ofequivalents, as circumstances may suggest or necessity render expedient.

We claim 1. In a machine of the class described, the combination ofmeans for holding a strip of wire in the machine, means forperforatingit at at least two points, and means for spreading it at oneof the perforations to form a key, substantially as described.

2. In a machine of the class described, the combination of means forholding the wire in the machine, means for perforating it at two pointsand cutting 01f the end, means for spreading it at one end to form aloop, and means for holding the wire at the loop end to preventdisruption thereof, substantially as described.

3. In a machine of the class described, the combination of means forholding a piece of wire in the machine, punch-and-die mechanismoperatively mounted in the machine to perforate the wire at two points,means for moving the wire a step forward, means for spreading one end ofthe wire, and means for cutting off the completed key, substantially asdescribed.

4. In a machine of the class described, the combination of means forholding the wire in the machine in position to be perforated, means forperforating the wire at two points, mechanism for feeding the wire in astep to present a blank piece for perforation and the perforated portionfor spreading, means for spreading one end of the wire to form a loop,means for holding the looped end of the wire to prevent disruption, anda cut-01f punch arranged to cut olf the completed key, substantially asdescribed.

5. In a machine of the class described, the combination of punch-and-diemechanism for perforating the wire at two points to form a loop and akey-slot, a rigid and a movable block for holding the body of thekey-blank in position while the spreading operation is performed andpermitting it to be discharged when such operation is completed, aslotted block arranged to move in line with the wire to hold the loopend of the key and permit it to be spread without disrupting the entireend of the key, a spreading-tool arranged to be moved forwardly andbackwardly and spread the loop "end of the key, a cut-off punch arrangedto be operated at the desired time to cut oif the completed key, andmeans for moving the holding-blocks into and out of position to hold thewire and permit the key to be discharged, substantially as described.

6. In a machine of the class described, the combination of means forfeeding the wire into the machine in position to be operated upon,punch-and-die mechanism for perforating the wire at two points to form aloop and a key-slot, mechanism arranged to operate the feeding means soas to feed the wire in at the desired times to move the perforated partinto position to be spread and cutoff and the blank part into positionto be punched or perforated, a rigid and a movable block for holding thebody of the key-blank in position while the spreading operation isperformed and permitting it to be discharged when such operation iscompleted, a slotted block arranged to move in line with the wire tohold the loop end of the key and permit it to be spread withoutdisrupting the entire end of the key, a spreading tool arranged to bemoved forwardly and backwardly and spread the loop end of the key, acut-ofif punch arranged to be operated at the desired time to cut offthe completed key, and means for moving the holding-blocks into and outof position to hold the wire and permit the key to be discharged,substantially as described.

7. In a machine of the class described, the combination of punch-and-diemechanism for perforating the key, a cut-off punch for cutting off thecompleted key, a cross-head upon which these punches are mounted andwith which they are moved back and forth,a spreading-tool, a slide uponwhich such spreadingtoolis mounted slidingly mounted in the crosshead, arigid holding-block against which the body of the key-blank can bepressed, a movable holding-block arranged in line therewith and adaptedto be moved into and out of position to hold the body of the key blankagainst the rigid holder, a holder mounted upon a slide. arranged tomove in line with the wire, mechanism arranged to be operated by thislast-named longitudinal movable slide to operate the movablebody-holder, and a crank-shaft for operating the punching, cutofi andspreading mechanism, substantially as described.

8. In a machine of the class described, the combination of means formoving a strip of wire into position to be perforated and spread,punch-and-die mechanism for perforating the key, a cut-0E punch forcutting oflf the completed key, a cross-head upon which these punchesare mounted and with which they are moved back and forth, aspreading-tool, a slide upon which such spreading tool is mountedslidingly mounted in the cross-head, a rigid holding-block against whichthe body of the key-blank can be pressed, a movable holding-blockarranged in line therewith and adapted to be moved into and out ofposition to hold the body of the key-blank against the rigid holder, aholder mounted upon a slide arranged to move in line with the wire,mechanism arranged to be operated by this last-named longitudinalmovable slide to operate the movable body-holder, and a crankshaft foroperating the punching, cut-off and spreading mechanism, substantiallyas described.

9. In a machine of the class described, the combination of means formoving a strip of wire in to position to be perforated and spread,

punch-and-die mechanism for perforating the wire to form a key-slot anda loop, a cut-off punch for cutting off the completed key, a cross-headin which these punches are mounted and with which they are moved backand forth, a spreading-tool arranged to be inserted in one of theperforations and spread the same to form a loop, a slide to which thisspreading-tool is affixed slidingly mounted in the cross-head, a rigidblock secured to the bed of the machine against which the body of thekey-blank may be held during the operation ofspreading and arranged atright angles to the length of the wire, a movable holding-block in linewith a rigid holding block and arranged to be moved back and forth tohold and release the wire, a holder mounted upon a slide, in turnmovably mounted on the bed of the machine in line with the wire andgrooved or slotted to hold the loop end of the wire and prevent thedisruption of the same during the operation of spreading,cam-and-levermechanism connecting the movable body-holder and longitudinal loopholdertogether, whereby the movements of the latter serve to operate theformer,a crankshaft fol-operating the cross-head, a cam upon thecross-shaft contacting with and operating the spreader-slide, and asecond cam arranged to be operated by the crank-shaft engaging with alongitudinal loop-holder to operate the same, substantially asdescribed.

10. In a machine of the class described, the combination of means forfeeding the wire into position to be perforated and spread,punch-and-die mechanism for perforating the wire, a cut-off punch forcutting off the completed key, a cross head in which these punches aremounted and with which they are moved back and forth, a spreaderarranged to be inserted in one of the perforations and spread the sameso as to form a loop, a slide to which this spreader is attachedslidingly mounted in the cross-head, a rigid holdingblock secured to thebed of the machine at right angles to the movement of the wire to holdthe body of the key-blank in position during the operation of spreading,a movable block arranged in line therewith to hold the body of the wireagainst the same and release it at the proper time or times, alongitudinally-m ovable block arranged to move lengthwise of the wireand grooved or perforated to hold the looped end of the key-blank duringthe operation of spreading and prevent the disruption thereof, avibrating lever secured to the bed of the machine and contacting themovable body-holder, a cam secured to the loop-holder arranged tooperate the vibrating lever and thereby the movable holder, twobacking-blocks movably mounted in the bed of the machine and meeting ata point midway of the loop-perforation of the keyblank and adapted to beseparated by the action of the spreader and furnish a back for the loopduring the operation of spreading,

spring mechanism for normally holding the backing-blocks in position, acrank-shaft, a

pitman connecting the crank and cross-head together, a face-cam mountedon the crankshaft having its cam-groove connecting with thespreader-slide to operate the same, a second face-cam mounted upon ashaft arranged at right angles to the crankshaft and provided with acam-groove engaging with the loop-holder, and gear mechanism connectingthe last-named shaft with the crankshaft, substantially as described.

11. In a machine of the class described, the combination of means forfeeding the wire into position to be perforated and spread, punchaud-diemechanism for perforating the wire, a cut-ofi punch for cutting off thecompleted key, a cross-head in which these punches are mounted and withwhich they are moved back and forth, a spreader arranged to be insertedin one of the perforations of the key-blank and spread the same so as toform a loop, a slide to which this spreader is attached slidinglymounted in the cross-head, a rigid holding-block secured to the bed ofthe machine at right angles to the movement of the wire to hold the bodyof the key-blank in position during the operation of spreading, amovable block arranged in line therewith to hold the body of the wireagainst the same and release it at the proper time or times, alongitudinally-movable block arranged to move lengthwise of the wireduring the operation of spreading and prevent the disruption thereof, avibrating lever secured to the bed of the machine and containing themovable b0dyholder, a cam secured to the loop-holder slide and arrangedto operate the vibrating lever and thereby the movable body-holder, twobacking-blocks movably mounted in the bed of the machine and meeting ata point midway of the loop-perforation and adapted to be separated bythe action of the spreader and furnish a back for the loop during theoperation of spreading, spring mechanism for normally holding thebacking-blocks in position, a crank-shaft, a pitman connecting the crankof the crank-shaft and cross-head together, a face cam mounted on thecrankshaft having its cam-groove connecting with the spreader-slide tooperate the same, a second face-cam mounted upon a shaft arranged atright angles to the crank-shaft and provided with a cam-groove engagingwith the loop-holder, gear mechanism connecting the last-named shaftwith the crank-shaft, and a discharging-plunger arranged to be contactedby the completed loop and when the holders are removed to assist indischarging the completed key, substantially as described.

JOHN ZIMMERMAN. RUDOLPH WIRTH.

Witnesses:

HARRY IRWIN OROMER, THOMAS F. SHERIDAN.

